h1 {
    color: rgb(110, 172, 172);
    font-size: 70px;
}

p {
    color: rgb(90, 161, 202);
}

img {
    width: 300;
    height: 500;
}

.red {
    color: rgb(119, 154, 219);
}

.blue {
    color: cornflowerblue;
}

body {
    /*font-family: 'Courier New', Courier, monospace;*/
}

p {
    font-weight: bolder;
    font-style: normal;
    /*font-style: italic;
    font-size: 20px;
    font-family: sans-serif,"宋体";*/
    text-indent: 2em;
}

p {
    /* text-align: left; 
    text-indent: 2em;
    line-height: 20px;
    letter-spacing: 2em;*/
}

body {
    background-color: cornsilk;
    font-size: 20px;
}

h1 {
    /*font-size: 70px;*/
}

a {
    text-decoration: none;
}

a {
    /* text-decoration: underline;有下划线*/
}

h3 {
    text-align: left;
}

h2 {
    text-align: left;
}

.yang {
    text-align: center;
}

iframe {
    height: 400px;
    width: 600px;
}